Speed Controller TRIZ Cases

Randomized inverter switching spreads tonal sidebands to mask traction motor harmonics and help EV drivetrains meet NVH targets.

Opposite-phase capacitor switching in an isolated vehicle TVS counters stray-capacitance voltage swings and cuts common-mode EMI.

A motor disconnector creates shift-like impact in EVs, restoring driving excitement while keeping fixed-ratio drivability smooth.

Coordinated regenerative and hydraulic braking maintains deceleration during transmission downshift while reducing shift shock and braking slip.

Resolver-based motor rotation guides an EV into the nearest parking lock tooth space, reducing shock, vibration, and drivetrain stress.

Integrated motor control and a brake resistor enable automatic braking and traction control in micromobility fleet powertrains with lower system cost.

Wheel slip feedback reduces one-pedal deceleration when thresholds are exceeded, improving vehicle stability and predictable braking.

Switching between single and parallel power modules cuts EV converter losses, reduces heating, and saves energy across operating conditions.

Multiple low-voltage inverters and phase groups cut motor drive losses, insulation stress, and EMI while preserving speed and torque.

Passenger-compartment sound analysis lets the controller switch engine speed and inverter frequency to cut powertrain noise annoyance.

Voltage-ratio-based switching between MTPA and square-wave measurement speeds motor torque map generation while limiting current vector errors.

A switchable off-chip and on-chip ZQ calibration scheme cuts DRAM power and timing overhead while preserving impedance matching.

A hybrid Si-MOSFET and GaN nine-switch inverter cuts EV switching losses and EMI while lowering wide-bandgap device cost.

Coordinated vehicle, motor, and electronic handbrake control enables smooth single-pedal stopping and parking with better energy utilization.

By tuning motor-to-wheel inertia moments above yaw resonance, this differential drive layout suppresses turn-induced vehicle vibration.

Acceleration commands are adjusted from battery output current and degradation state to limit high-current discharge during EV acceleration.

By adjusting carrier frequency and correcting d-q voltage commands, this case stabilizes motor torque during inverter overmodulation.

Placing the EV connector beside the relay box and toward the cabin reduces collision interference while keeping the power system integrated.

Predictive motor speed control starts torque limiting before resonance during regenerative braking, reducing shock, vibration, and noise.

Historical route data guides fuel cell output for upcoming driving events, improving fuel economy while reducing wear and battery load.

Dual-layer checks compare sensed and calculated gear-stick positions, then force a safe state when EV shift logic is inconsistent or invalid.

Competing torque requests are resolved by supervisory control that synchronizes motor speed in AMT shifts, reducing wear and shift errors.

Low-pass filtered force sensing lets a trailer motor counter tow bar loads, reducing rider effort while keeping towing stable on slopes.

A sampled feedback boost circuit raises motor input voltage during battery discharge, helping EVs maintain acceleration and speed.

A comparator-driven protective circuit isolates inverter gate drives during voltage faults, avoiding complex software safety hardware in vehicles.

A branched conductive path transfers heat from the battery-capacitor connection to the control board, limiting capacitor temperature rise.

Actual phase voltage detection via midpoint levels bypasses dead time correction errors and improves rotating pole position correction accuracy.

High-frequency AC and electromagnetic induction replace long DC wires at construction machine joints, reducing leakage risk and preserving smooth motion.

A velocity-based slip ratio limit adapts driving torque control to preserve friction, traction, and vehicle stability across changing speeds.

Road-aware control activates trailer wheel motors only when needed, cutting towing vehicle power draw and improving stability on grades.

Sensor fusion of displacement and motion signals keeps a guideway-traveling mass on position while cutting vibration and power dissipation.

A supercapacitor buffer captures braking energy faster than the battery can charge, then meters transfer to protect the battery and cut heat loss.

Dynamic PWM frequency tuning helps this modular half-bridge buck-boost converter cut heat loss while maintaining efficient bi-directional power conversion.

A DC/DC converter and standby circuit let a mobile work machine start and power monitoring electronics without a separate on-board battery.

Module-level sensors adjust coolant flow for each EV battery segment, improving charging heat control, battery life, and cooling efficiency.

A cab-mounted manual input lets drivers handle special trailer conditions while the control unit preserves stable, efficient electric drive operation.

By placing the output member between the motor and inverter and overlapping the output gear, this layout shrinks the drive unit axial footprint.

A virtual field bus interface links drive controller models with peripheral variables, enabling accurate standalone simulation with less coding effort.

Battery-powered dual hub motors replace heavy engine gearboxes in snow throwers, improving cold starts, wheel control, and maintenance.

Carrier-wave phase shifting cuts motor pulsation, while fluctuating torque estimation corrects current commands to avoid torque loss.

When a stopped EV battery charge is low, staged protection limits nonessential power functions to prevent over-discharge and preserve restart capability.

A relay box mounted radially on the gear casing routes charging and neutral-point circuits through a connecting hole to shrink EV drive casing width.

Dual pressure supply units and closed brake circuits keep EV braking, stability, and torque vectoring available even during component failures.

A main switching element lets one traction converter use the other chain's energy storage, preserving propulsion and vehicle range after failure.

Temperature rise feedback rebalances dual-motor output under peak demand to prevent overheating and preserve vehicle dynamic quality.

A characteristic torque map switches front and rear e-motor drive states by speed and demand to cut energy use while preserving traction.

An excitation circuit draws from split bus capacitors to correct large midpoint voltage offsets while cutting switching losses and device voltage stress.

Independent left and right wheel motors use average and differential speed control to handle travel, stopping, and turning with simpler vehicle hardware.

A bifunctional polymer in polyarylene sulfide improves sealing-resin adhesion at high temperatures while preserving insulation and flame retardancy.